jalap or ipomoea purga, vintage engraving

ancient antique art artwork black botanical botany cathartic convolvulaceae drawing drug edible engraved engraving etching flora floral flower flowering food garden gardening green herb herbal herbology horticultural horticulture illustration ipomoea jalap jalapa laxative leaf leaves medicinal medicine old ornamental picture plant purga root simulans tuber tuberous vector vintage white yam